As both the initial application and the review were initiated before 3 april 2006, you qualify for ILR after 4 years. Do you have proof of those dates? Any of the ff. -- copy of your application form (which would be on the old form), acknowledgment letter, correspondence about the refusal and ...

I have a slightly complex case. I am currently in the UK on Tier1 visa (which was given in 2008 for 3 years). Initial application for HSMP was made in February 2006 (e.g. under old rules), however this application was declined, I then immediately requested review of the case (end of March 2006) and ...